Hi all, I have two TAD 6v6. One with a PC rating of 35, the other 32. A difference of 3. I seem to remember but can no longer find the reference, that a max PC difference of 3 is acceptable? Can I use them together? I understand my amp won’t be as clean but will it harm either the tubes or the amp? I am using a Deluxe Reverb. Thanks in advance!